Overview
The INA191A1IYFDR from Texas Instruments is a low-power, voltage-output, current-shunt monitor, also known as a current-sense amplifier. This device is designed for precision current measurement and is suitable for both low-side and high-side current-sensing configurations. It operates from a single supply voltage of 1.7 V to 5.5 V and features a low quiescent current of 43 µA at 25 °C, making it ideal for battery-powered devices and other power-sensitive applications. The INA191A1IYFDR is part of the INAx191 family, which is known for its high accuracy, low input bias currents, and wide common-mode voltage range of –0.2 V to +40 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VS) | 1.7 to 5.5 | V |
| Quiescent Current (IQ) | 43 (typ), 65 (max) | µA |
| Shutdown Current (IQDIS) | 100 nA (max) | nA |
| Input Bias Current | 100 pA (typical) | pA |
| Gain Error | ±0.25% (max) | % |
| Offset Voltage | ±12 µV (max) | µV |
| Common-Mode Voltage Range | –0.2 to +40 | V |
| Gain Options | 25 V/V (INA191A1) | V/V |
| Operating Temperature Range | –40 to +125 | °C |
| Package | DSBGA-6 (1.17 mm × 0.765 mm) |
Key Features
- Low Power Consumption: The device operates with a low quiescent current of 43 µA at 25 °C and a shutdown current of 100 nA, making it suitable for power-sensitive applications.
- High Accuracy: Features a gain error of ±0.25% and an offset voltage of ±12 µV, ensuring precise current measurements.
- Wide Common-Mode Voltage Range: Can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.
- Low Input Bias Current: Typical input bias current of 100 pA, enabling accurate current measurements in the microampere range.
- Multiple Gain Options: Available in various gain options: 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- Enable Pin: Features an enable pin that allows the device to be turned on or off, reducing supply current when disabled.
Applications
- Notebook Computers: Ideal for power management and current monitoring in portable computing devices.
- Cell Phones: Used in battery-powered devices for precise current measurement and power optimization.
- Battery-Powered Devices: Suitable for devices requiring low power consumption and high accuracy in current measurement.
- Telecom Equipment: Employed in telecommunications equipment for current sensing and power management.
- Power Management: Used in various power management systems to monitor and optimize current flow.
- Battery Chargers: Applied in battery charging systems to ensure accurate and efficient charging processes.
Q & A
- What is the operating supply voltage range of the INA191A1IYFDR?
The operating supply voltage range is from 1.7 V to 5.5 V.
- What is the typical quiescent current of the INA191A1IYFDR?
The typical quiescent current is 43 µA at 25 °C.
- What is the maximum shutdown current of the INA191A1IYFDR?
The maximum shutdown current is 100 nA.
- What is the typical input bias current of the INA191A1IYFDR?
The typical input bias current is 100 pA.
- What are the available gain options for the INA191 series?
The available gain options are 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the common-mode voltage range of the INA191A1IYFDR?
The common-mode voltage range is from –0.2 V to +40 V.
- What is the purpose of the enable pin on the INA191A1IYFDR?
The enable pin allows the device to be turned on or off, reducing supply current when disabled.
- What are some typical applications of the INA191A1IYFDR?
Typical applications include notebook computers, cell phones, battery-powered devices, telecom equipment, power management systems, and battery chargers.
- What is the operating temperature range of the INA191A1IYFDR?
The operating temperature range is from –40 °C to +125 °C.
- What package options are available for the INA191A1IYFDR?
The device is available in a DSBGA-6 package (1.17 mm × 0.765 mm).
